Col
d knowledge refers to information that may not be commonly known or discussed, but still holds some fascination and intrigue. Here are a few examples of some interesting and perhaps slightly unsettling facts.
1. How long can a human survive without sleep? While the exact answer to this question varies from person to person, the longest recorded time an individual has gone without sleep is 11 days. However, it's worth noting that sleep deprivation can have serious negative effects on physical and mental health, and even shorter periods without sleep can be dangerous.
2. How many species are on our planet? Scientists estimate that there are anywhere from
8.7 to 30 million species on Earth. However, only around
1.2 million of these species have been officially documented and named so far.
3. Can people really be allergic to water? Yes, it is possible for some individuals to be allergic to water. This condition, known as aquagenic urticaria, causes an itchy rash to develop when the skin comes into contact with water. It's extremely rare, but can be incredibly uncomfortable for those who experience it.
4. How much of the ocean has been explored? While humans have made some impressive strides in ocean exploration and research, we have only explored and mapped around 5% of the world's oceans. This means that there are vast areas of the ocean that remain uncharted and unexplored.
5. What happens to your body in space? When astronauts venture into space, they experience a number of physical changes that are unique to the microgravity environment. These can include loss of bone density, muscle atrophy, and changes in fluid distribution. Additionally, exposure to radiation in space can be harmful to human health. Overall, cold knowledge can be both fascinating and slightly unnerving. Whether learning about the mysteries of the deep sea or the effects of sleep deprivation, there is always more to be discovered about the world around us.